- Anyone knw how to put 1/4+1+9/4+4+25 into sigma notation, I need help please?

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Number Theory: Find the roots of 4x^2+6x+1 in Z11 (could you please explain step by step? THANKS!)? How many molecules are in 97.8g of FeCl3? Verify that M(u,v)=A +u(B-A) +v(C -A) ( A,B,C vectors) is a parametric representation of surface of the triangle A(1,0,0) B(0,-1,2) C(0,2,1)? A constant current of 1A flow in circuit over period of 5s.total charge flowing through circuit over this duration will be.
Expert plz and? White light is directed at difraction grating at angle normal to gratting.starting at norml to grating 0dgre the odr of red,gren,blue wil be?